[Asterisk-Users] Huge Echo

[steve at daviesfam.org]

On Fri, 9 Sep 2005 steve at daviesfam.org wrote:

> Could you have a cabling issue?  Like one leg of the pair grounded?  I'm 
> not really a telco engineer but I have this vague idea that this can cause 
> echo trouble?  Can anyone confirm or deny?

Ah yes, 
http://www.voip-info.org/tiki-index.php?page=Asterisk+echo+analog+lines 
talks about grounded legs of the call and bridge taps.

I suspect you could also get the effect of a grounded leg if you only 
actually have one side of the pair connected; a return path via ground may 
be found to give you a very unbalanced connection.

Your RJ11 cable could be wrong and on the wrong pins to result in just one 
leg being connected.

Steve